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Class Information
Number: 73/301
Name: Measuring and testing > Liquid level or depth gauge > Hydrostatic pressure type > With electrically controlled indicator
Description: Gauges having at least one indicator electrically controlled by means responsive to the hydrostatic pressure.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7406871 |
Fuel type identifying apparatus |
Aug. 5, 2008 |
| 7389688 |
Indirect liquid level measurement |
Jun. 24, 2008 |
| 7324901 |
Water measurement auto-networks |
Jan. 29, 2008 |
| 7251996 |
Liquid detecting piezoelectric device, liquid container and mounting module member |
Aug. 7, 2007 |
| 7225670 |
Mounting structure, module, and liquid container |
Jun. 5, 2007 |
| 7095330 |
Disposable liquid level sensor having a virtual ring |
Aug. 22, 2006 |
| 7000468 |
Electronic level gauge |
Feb. 21, 2006 |
| 6907780 |
Fuel level sensor |
Jun. 21, 2005 |
| 6889669 |
System and method of managing pressure in a fuel system |
May. 10, 2005 |
| 6829928 |
Method of accurately gauging groundwater and nonaqueous phase liquid contaminants which eliminates cross contamination between wells |
Dec. 14, 2004 |
| 6799457 |
Bubble level meter and related method |
Oct. 5, 2004 |
| 6745626 |
Liquid detecting piezoelectric device, liquid container and mounting module member |
Jun. 8, 2004 |
| 6606905 |
Liquid level and weight sensor |
Aug. 19, 2003 |
| 6595051 |
Fluid level sensing and control system |
Jul. 22, 2003 |
| 6553830 |
Fluid measuring device measuring fluid level in a container at high temperatures and/or high pressures and/or in a chemically aggressive environment using microwaves |
Apr. 29, 2003 |
| 6490919 |
Well water level measurement and display apparatus |
Dec. 10, 2002 |
| 6470744 |
Liquid detecting piezoelectric device, liquid container and mounting module member |
Oct. 29, 2002 |
| 6443005 |
Pressure activated control |
Sep. 3, 2002 |
| 6370952 |
Vehicle oil level monitoring system |
Apr. 16, 2002 |
| 6345214 |
Device for monitoring the storage level of a product stored in a tank |
Feb. 5, 2002 |
| 6186001 |
Sensor for measuring content levels in containers |
Feb. 13, 2001 |
| 6142017 |
Hydrostatic pressure equalizer apparatus and system |
Nov. 7, 2000 |
| 6023971 |
Angle sensor and monitoring circuit |
Feb. 15, 2000 |
| 5966311 |
Method of overfill probe identification and control |
Oct. 12, 1999 |
| 5953954 |
Installation and method for determining the level and density of a liquid in a tank, using a single immersed bubble probe |
Sep. 21, 1999 |
| 5802910 |
Measuring system for liquid volumes and liquid levels of any type |
Sep. 8, 1998 |
| 5678449 |
Intake-and-gauging device for the fuel in a motor vehicle |
Oct. 21, 1997 |
| 5669956 |
Apparatus and method for molten metal depth detection |
Sep. 23, 1997 |
| 5644088 |
Port forward sensor for liquid level gauge or flowmeter |
Jul. 1, 1997 |
| 5528941 |
Differential pressure sensor connector for fuel tank |
Jun. 25, 1996 |
| 5519638 |
Automatic system for monitoring and replenishing hazardous liquids in tanks |
May. 21, 1996 |
| 5475720 |
Non-condensable gas tolerant condensing chamber |
Dec. 12, 1995 |
| 5469739 |
On-line fishing depth indicator with encapsulated components |
Nov. 28, 1995 |
| 5351725 |
System for monitoring fills of liquid in a tank container and ongoing liquid condition |
Oct. 4, 1994 |
| 5351538 |
On-line fishing depth indicator |
Oct. 4, 1994 |
| 5347863 |
Asphalt oil tank monitor |
Sep. 20, 1994 |
| 5325716 |
Apparatus for determining the pressure distribution along a limited distance and method for manufacturing it |
Jul. 5, 1994 |
| 5319964 |
Apparatus, method and system for monitoring fluid |
Jun. 14, 1994 |
| 5315876 |
Purge gas pressure monitoring system |
May. 31, 1994 |
| 5305642 |
Portable high precision pressure transducer system |
Apr. 26, 1994 |
| 5279161 |
Purge gas pressure monitoring system with temperature compensation |
Jan. 18, 1994 |
| 5272920 |
Apparatus, method and system for monitoring fluid |
Dec. 28, 1993 |
| 5247833 |
Water level measuring apparatus |
Sep. 28, 1993 |
| 5245869 |
High accuracy mass sensor for monitoring fluid quantity in storage tanks |
Sep. 21, 1993 |
| 5211678 |
Apparatus, method and system for monitoring fluid |
May. 18, 1993 |
| 5163324 |
Bubbler liquid level sensing system |
Nov. 17, 1992 |
| 5146783 |
Liquid container hydrostatic level gauge |
Sep. 15, 1992 |
| 5090242 |
Remote, pneumatic, continuous sensor of the liquid level in a vacuum tank |
Feb. 25, 1992 |
| 5079784 |
Hydro-massage tub control system |
Jan. 14, 1992 |
| 5063778 |
Apparatus for measuring the level of a liquid in a wetwell |
Nov. 12, 1991 |
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